Which one of the following statements best describes andquot;Endosymbiotic Theoryandquot;?andquot;a)Organisms evolve through natural selection and adaptation.b)Some organelles in eukaryotic cells were once independent prokaryotic microbes.c)Cells arise spontaneously from non-living matter.d)Genetic material is passed from parents to offspring through inheritance.Correct answer is option 'B'. Can you explain this answer?

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Which one of the following statements best describes "Endosymbiotic Theory"?"

a)
Organisms evolve through natural selection and adaptation.
b)
Some organelles in eukaryotic cells were once independent prokaryotic microbes.
c)
Cells arise spontaneously from non-living matter.
d)
Genetic material is passed from parents to offspring through inheritance.

Correct answer is option 'B'. Can you explain this answer?

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Which one of the following statements best describes "Endosymbiot...

Two papers published recently have generated new interest in the endosymbiotic theory.

About Endosymbiotic Theory:

The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes.
In this theory, the first eukaryotic cell was probably an amoeba-like cell that got nutrients by phagocytosis and contained a nucleus that formed when a piece of the cytoplasmic membrane pinched off around the chromosomes.
Some of these amoeba-like organisms ingested prokaryotic cells that then survived within the organism and developed a symbiotic relationship.
Mitochondria formed when bacteria capable of aerobic respiration were ingested; chloroplasts formed when photosynthetic bacteria were ingested. They eventually lost their cell wall and much of their DNA because they were not of benefit within the host cell.
The endosymbiotic theory describes how a large host cell and ingested bacteria could easily become dependent on one another for survival, resulting in a permanent relationship.
Over millions of years of evolution, mitochondria and chloroplasts have become more specialized, and today they cannot live outside the cell.

Hence option b is the correct answer.

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Which one of the following statements best describes "Endosymbiotic Theory"?"a)Organisms evolve through natural selection and adaptation.b)Some organelles in eukaryotic cells were once independent prokaryotic microbes.c)Cells arise spontaneously from non-living matter.d)Genetic material is passed from parents to offspring through inheritance.Correct answer is option 'B'. Can you explain this answer?

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Which one of the following statements best describes "Endosymbiotic Theory"?"a)Organisms evolve through natural selection and adaptation.b)Some organelles in eukaryotic cells were once independent prokaryotic microbes.c)Cells arise spontaneously from non-living matter.d)Genetic material is passed from parents to offspring through inheritance.Correct answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which one of the following statements best describes "Endosymbiotic Theory"?"a)Organisms evolve through natural selection and adaptation.b)Some organelles in eukaryotic cells were once independent prokaryotic microbes.c)Cells arise spontaneously from non-living matter.d)Genetic material is passed from parents to offspring through inheritance.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements best describes "Endosymbiotic Theory"?"a)Organisms evolve through natural selection and adaptation.b)Some organelles in eukaryotic cells were once independent prokaryotic microbes.c)Cells arise spontaneously from non-living matter.d)Genetic material is passed from parents to offspring through inheritance.Correct answer is option 'B'. Can you explain this answer?.

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